Question

1802-802 : x = 900 x 2 

 

Answer 1

\(1802-802:x=900\times2\\ \Rightarrow1802-802:x=1800\\ \Rightarrow802:x=1802-1800\\ \Rightarrow802:x=2\\ \Rightarrow x=802:2\\ \Rightarrow x=401\)

Answer 2

`1802-802:x=900xx2`

`802:x=1802-900xx2`

`802:x=2`

`x=802:2`

`x=401`

Vậy `x=401`